Hermeus is developing an expendable ramjet-powered aircraft, Ramjet-X, which will be air-launched from its reusable, F-16-sized Quarterhorse high-speed drone. The result aims to create a two-vehicle architecture intended to make high-speed flight testing less dependent on expensive, single-use test platforms. That would give Hermeus and potential customers a way to conduct repeated high-Mach flight tests without expending a large booster on every mission.

America didn’t lose ground in high-speed flight because of a lack of ideas. We slowed down because flight tests became too expensive, too rare, and too cautious.

Meet Ramjet-X. Air-launched from the Quarterhorse program, it’s a low-cost, repeatable test vehicle built to fly and… pic.twitter.com/rMed6NhcvD

— Zach Shore (@Zsshore) September 9, 2026

The company unveiled the concept today. Hermeus says the Ramjet-X will be carried beneath Quarterhorse and released at a speed of around Mach 3, at which its ramjet can begin operating. The smaller vehicle will then accelerate, climbing to around 100,000 feet, and a speed in the region of Mach 4. Quarterhorse will then return to base and be available for another mission.

Imagery released by Hermeus shows a Quarterhorse carrying a Ramjet-X mounted on a pylon under each wing, indicating that two different high-speed tests can be carried out in a single sortie. Intriguingly, the Quarterhorse is shown with no fewer than six underwing hardpoints in all, suggesting that other kinds of external payloads are envisaged.

Hermeus has not released detailed performance specifications for Ramjet-X, including its range, payload capacity, or the critical expected cost per flight. We have reached out to the company for more information.

Images released by the company show a relatively compact, missile-like vehicle with delta wings incorporating prominent dihedral. There are no horizontal tail surfaces, but a conventional vertical fin is complemented by a ventral fin. Axios reports that Ramjet-X is approximately 22 feet long and 7 feet wide.

In terms of appearance, and also thanks to its ramjet propulsion system, the vehicle is outwardly very reminiscent of the Lockheed’s D-21 Tagboard supersonic spy drone. However, at more than 40 feet long and with a wingspan of 20 feet, the D-21 was significantly bigger. Overall, the entire concept recalls the Cold War-era D-21 and its M-21 mothership, on a smaller scale.

The basic concept aims to address a longstanding problem with ramjet flight testing. Unlike a conventional jet engine, a ramjet cannot provide useful thrust from a standstill. The vehicle therefore has to be accelerated to a sufficiently high speed before the ramjet can take over.

That acceleration can traditionally require another propulsion system, including an expendable rocket booster. Hermeus is proposing to substitute a reusable aircraft for that initial boost. It is unclear if the Ramjet-X vehicles are similarly recoverable, but we have asked Hermeus for more details here, too.

As it stands, flight-test programs of this kind are often constrained not only by the cost and availability of test infrastructure, but also by the limited availability of suitable airspace and range access. A reusable carrier aircraft could help address both challenges, allowing multiple Ramjet-X vehicles to be deployed from airports near a designated test range as required and launched only once the vehicle is within the approved test area. That flexibility could reduce the need for a new large booster for every experiment while also making it easier to conduct tests, including at shorter notice, within increasingly constrained airspace.

Hermeus says Ramjet-X is being designed not just for its own development work but as a potential test platform for outside customers. The company is calling the concept “Flight Test as a Service,” with customers able to fly payloads including sensors, communications equipment, computing and autonomy systems, materials, and propulsion hardware.

The program reflects a broader push toward increasing the availability of commercial high-speed flight testing that has attracted U.S. government interest.

Hermeus was also selected by the Defense Innovation Unit for work under its Hypersonic and High-Cadence Airborne Testing, or HyCAT, effort. That program is intended to use commercial flight-test capabilities to expand the government’s access to relevant high-speed environments.

The company is also pursuing its own increasingly ambitious Quarterhorse aircraft. Its Quarterhorse Mk 2.1 completed an uncrewed supersonic flight earlier this year, reaching Mach 1.21 on its third test flight. The company’s roadmap calls for subsequent Quarterhorse variants to progressively increase speed and address the thermal and propulsion challenges associated with high-Mach flight.

Supersonic. Mach 1.21.

Quarterhorse Mk 2.1 is now the world’s first privately developed, unmanned supersonic jet and the fastest unmanned aircraft flying today.

This flight makes Hermeus the fastest company in aviation history to go from founding to supersonic flight – exactly… pic.twitter.com/wjoIcdiEOj

— Hermeus (@hermeuscorp) May 26, 2026

The imagery released for Ramjet-X shows a different Quarterhorse configuration than the 2.1 version, including beefed-up landing gear with twin nosewheels. The requirement for release of the Ramjet-X at Mach 3 suggests that its launch platform will be the Quarterhorse Mk 2.3, which will be the first to reach this kind of speed. This summer, Hermeus confirmed that its second supersonic aircraft, the Quarterhorse Mk 2.2, and the Mach 3-capable Mk 2.3 aircraft were under construction.

For its future Quarterhorse Mk 3, Hermeus has been developing Chimera, a turbine-based combined-cycle propulsion system. This is intended to transition from turbine operation to ramjet operation as speed increases.

Ramjet-X effectively separates part of that problem into another aircraft and the system could also be useful for experiments that do not require an entire hypersonic aircraft.

For example, an organization developing a high-temperature material might need to know how it behaves in an actual high-speed flight environment, rather than only in a ground test. The same could apply to weapons, sensors, communications systems, guidance hardware, onboard computers, or other components intended for high-speed vehicles.

So far, however, it’s not clear what kind of flight profiles Ramjet-X will provide. Hermeus has mentioned a cruise phase lasting “tens of minutes.”

But a short-duration dash through a high-Mach regime is not equivalent to sustained flight at those speeds. The duration available to an experiment, thermal loads, acceleration, vibration, available electrical power, telemetry, maneuverability, and payload mass will all determine what can actually be tested.

The company says it is already testing the Ramjet-X propulsion system at its High Enthalpy Air-Breathing Test facility in Jacksonville, Florida. High-temperature structures are also under development at its El Segundo, California, headquarters. Integrated vehicle testing is currently planned for 2027.

The HEAT facility itself is part of Hermeus’ effort to establish high-speed propulsion test infrastructure. The company says the facility is being developed to eventually provide continuous high-Mach airflow for more flight-like ground testing.

Ramjet-X has yet to fly, but if it performs as intended, it could help lower one of the major barriers to obtaining real-world flight data at high Mach numbers. At the same time, the company is entering a market that is attracting growing interest from other aerospace firms, which are also expanding their high-speed flight-test capabilities, especially to capitalize on the broader hypersonics boom, including Stratolaunch.

There is fairly clear potential weaponization of this concept, for strike and surveillance missions, as well, although there has been no indication of that being in the works at this time.

The planned 2027 integrated testing should provide the first meaningful indication of whether the concept can progress to become a practical high-speed test capability.

Contact the author: thomas@thewarzone.com

The post Hermeus Unveils Air-Launched Ramjet Test Vehicle for High-Speed Experiments appeared first on TWZ.

Covenant, a previously little-known defense startup, has emerged with a new long-range strike weapon, named Anthem, which it says is intended to provide a cheaper, more readily producible alternative to existing cruise missiles. Already in testing with the U.S. Army, the missile reflects the growing focus on weapons in this class that can be manufactured quickly in very large numbers, even if they sacrifice a significant degree of individual-weapon capability compared to more ‘exquisite’ and costly alternatives.

Covenant, a U.S.-Israeli company founded in 2024, unveiled its Anthem weapon system today along with plans for production in the United States, Germany, and Israel. The company says it has already conducted more than 200 test flights of the weapon and has secured roughly $150 million in orders.

The announcement comes as the United States and its allies are increasingly focused on the availability of long-range precision weapons, particularly the ability to replenish inventories during a major conflict. Covenant’s central pitch is that existing weapons in this category are too expensive and difficult to manufacture in sufficient numbers for a prolonged war, a reality that has been recognized by a bewildering number of new and established industry players.

Anthem is being positioned accordingly as a high-volume weapon rather than a one-for-one replacement for larger, more expensive cruise missiles. In its initial form, it is ground-launched, although it is unclear exactly how this is achieved. Imagery of the weapon during Pentagon trials show it being handled on the ground using tricycle undercarriage, pointing to the use of a runway for launch.

Covenant has not publicly disclosed the weapon’s range, although unconfirmed reports put it at roughly 1,200 kilometers — over 740 miles. The company is also being somewhat deliberate about how it describes Anthem, referring to it as a “deep precision-strike munition” rather than consistently classifying it as a cruise missile.

On the other hand, Reuters reports Covenant executives saying that the missile was developed ‌with an ⁠eye toward future conflicts in the Pacific. “We were designed for the China fight,” said Covenant President Abby Denburg. That would also seem to point toward significant range.

However, more concrete details of its performance, as well as guidance type and projected level of survivability, remain undisclosed.

The company says Anthem can carry a warhead weighing more than 200 kilograms (441 pounds). That is substantially less than the roughly 1,000-pound-class warhead associated with the Tomahawk cruise missile, which can hit targets at over 1,000 miles depending on the exact configuration. Covenant argues that lower cost and much higher production rates would make it possible to employ larger numbers of their weapons against a given target set.

Anthem uses a solid rocket motor for launch and a heavy-fuel jet engine, underslung below the missile body, for cruise flight. Covenant says the system was designed from the outset around readily available components and a supply chain that would avoid dependence on individual suppliers. The company states that it has, for example, multiple solid-rocket-motor suppliers and long-term agreements covering thousands of jet engines.

Overall, the production ambitions are significant. Covenant’s new Grand Prairie, Texas, facility covers approximately 105,000 square feet and is expected to begin serial production during the first quarter of 2027, eventually reaching a stated capacity of 5,000 Anthems per year. Its facility in Saxony, Germany, is intended to reach a similar production rate, while the smaller Israeli site is planned to produce as many as 2,000 weapons annually.

“Germany possesses an exceptionally strong industrial foundation,” Denburg told Bloomberg News. “While its automotive sector is currently undergoing a structural transformation, decades of manufacturing excellence have created precisely the expertise we require.”

That would put the company’s eventual combined production target at up to 12,000 weapons per year, assuming all three facilities reach their planned capacities.

Covenant’s U.S. facility is intended primarily to support American customers, while the German operation is being established around a European supply chain, responding to growing demand for long-range strike weapons across that continent. The company says an unidentified international customer is expected to begin receiving German-built weapons before the end of this year. Meanwhile, U.S. Army deliveries are expected in 2027, under an accelerated qualification contract.

The weapon has already been subjected to U.S.-linked testing. In August, an unnamed defense-industry partner conducted a live-fire demonstration at the Africa Multidomain Training and Experimentation Center in Morocco. The U.S. military’s public material about that event did not identify the weapon or company, but subsequent reporting identified the missile as Covenant’s Anthem.

Covenant now says the system has flown more than 200 times over the past year, including testing involving U.S. government organizations. The company also says Anthem participated in the Army’s Project Convergence Capstone 6 experiments and that its August test helped demonstrate a new framework for allowing industry to use the Moroccan test infrastructure.

Beyond the ground-launched version, Covenant is working on a naval derivative. The company says it has a roughly $70-million contract with the Navy’s Rapid Capabilities Office to adapt Anthem into what it calls Maritime Anthem. The effort includes Defense Exportability Features intended to make the weapon easier to provide to U.S. allies and partners.

The emergence of Anthem also illustrates how the defense industry’s current emphasis on mass production is extending into the long-range strike arena.

The United States already fields weapons such as Tomahawk and JASSM-ER, but those systems are expensive, and production capacity is limited. Covenant is betting that a weapon available in much larger quantities can provide commanders with another layer of long-range strike capacity, even if the destructive power of a single round falls well below that of a Tomahawk. Reuters reports that Covenant expects the weapon to eventually cost in the mid-six-figure range, although the company has not provided a final unit price. Compared to other competitors in the field, Covenant appears to be the crudest design we have seen so far, underscored by its apparent launch method, in which it takes off from an airstrip under power of its booster.

Recent combat operations have increased concerns about the rate at which more traditional precision weapons can actually be manufactured. Once stockpiles begin to reduce, long-range missiles have proven among the most difficult munitions to replace. That would only become more problematic during a major conflict.

Covenant has attracted venture-capital backing to pursue that problem. The company says it has raised more than $250 million from investors including Andreessen Horowitz, Founders Fund, Lux Capital, 8VC, Aleph, and Lightspeed. Its stated focus, however, is now shifting from development to production.

The key question will be whether Covenant can turn the promised production numbers into sustained deliveries. Building thousands of long-range weapons per year requires not only an assembly plant, but also a resilient supply chain, reliable propulsion production, testing capacity, quality control, and the ability to integrate those elements at scale. It will also rely on securing more contracts from domestic and allied customers.

For now, however, Anthem represents an intriguing entrant into a crowded but increasingly important segment of the weapons market.

Contact the author: thomas@thewarzone.com

The post Army Now Testing Anthem Long-Range Strike Weapon Built for Mass Production appeared first on TWZ.